Apparatus for testing the water of a boiler under pressure.



No. 862,870. PATENTED AUG. 6, 1907.

A. SGHMITZ.

APPARATUS FOR TESTING THE WATER OF A BOILER UNDER PRESSURE.

APPLICATION FILED NOV.2. 1905.

Witn esses: 12/ A 11w entor:

9 WM Uz /w/mf UNTTED STATES PATENT AUGUST SCHMITZ, OF AlX-LA-OHAPELLE,GERMANY,

APPARATUS FOR TESTING THE WATER OF A BUTLER UNDER PRESSURE.

Specification of Letters Patent.

Patented Aug; 6, 1997.

Application filed November 2, 1905. Serial No- 285,644.

To all whom it may concern:

Be it known that 1, AUGUST SoHMrrz, a citizen of the German Empire,residing at Aix1a-Cl 1apelle, State of Prussia, Germany, have inventedan Apparatus for Testing the Water of a Boiler Under Pressure, of whichthe following is a complete specification, reference being had to'theaccompanying drawings.

Apparatus are already known which have for their object thedetermination by reagents of the quantities of soda lye or the like tobe added to boiler water for the purpose of precipitating substanceswhich form, scale in the boiler. Such apparatus in general remove fromthe boiler a quantity of water, add to it the reagent fluid, and therebyis supposed to cause the larger or smaller supply of soda to beindicated in different degrees by the change of color. This methodmoreover depends upon the principle that when for instance, too littlesoda is present in the water the addition of the reagent should give apink color, that in the case of sufficient soda in the water a red colorshould indicate this and that excess of soda should be indicated by adark red color. But in this examination there is'a large error whichprevents the proper determination of the quantity of soda or the like.If, namely a boiler be supplied with soda, there accumulates from day today a greater concentration of soda in the boiler watch. During thefirst hours of the supply of the boiler with sufficient soda the colorof reactions may be correct; if however the quantity of soda added beincreased daily by that subsequently added, which cannot be removedfroni the boiler by evaporation but remains together with theprecipitated salts of lime in the boiler, there will then occur aconcentration of the soda and the above describedtest fails completely.A graduation of the red color does not occur any more, the color remainsred and the boiler has according to circumstances either too little ortoo much soda. This method leads consequently to erroneous conclusions.7

Recognizing the drawbacks of this veryunsatis factory and entirelyerroneous test of the regular action of a boiler under operation andgiving entirelywrong results, the present invention differs from it inthat the water taken from the boiler under operation is first caused toreact to a predetermined shade of color which is what would be producedif the water were sufiiciently treated with soda, and then this reactionis again caused to return to the original color of the water simply bymeans of a color removing test. In this manner a thoroughly reliableresult is obtained with relation to the recognition of the addition ofsoda, because precisely the latter reaction only occurs whenjn fact theboiler water has suflficient soda. In the case of an excess ordeficiency of soda the removal of color occurs too late or too soonwhereby it may be seen that the supply of the soda must be increased ordiminished.

The accompanying drawing illustrates the new apparatus.

' Upon the plate 1 are secured two glass cylinders 2 and 3 connected bya cock 4 between them. Through the tube 5 the water to be examined isdrawn from the boiler under operation in the well known manner into theupper cylinder 2 through the three-way cock 6. Above this cock areplaced the glass vessels 7, 8, 9 each being provided with an ordinarycock 7, 8, 9 respectively, so that by opening one or the other, therespective reagent can flow down and commingle with the boiler water inthe glass 2. Below the connecting cock 4 is placed on one side the glassvessel 10 the connection whereof with the glass cylinder 3 is effectedthrough the cock ll. The glass cylinder 3 possesses at its lower end theoutlet pipe 12 with the cock l3. Connection between the three-way cock 6and the cock 4 is effected through the tube 14 which is provided alsowith a three-way cock 1.5. From the latter the tube 16 branches off, thelower end whereof serves to support the glass "cylinder 17. In thiscylinder is placed the float 18. At both sides of the lower glasscylinder 3 is placed the plate 19. This device consists therefore of twoglass cylinders or show glasses 2 and 3 connected together. In the firstonethcre is produced a color reaction by the addition of a few drops ofthe test solution from one of the three vessels 7, 8, 9, which isintended to determine whether any, deficiency or excess, of soda or thelike is present in the boiler water to prevent the formation of scaleand corrosion. But this result as originally carried out is only certainunder certain conditions. Therefore in the new apparatus this colorreaction is tested for its reliabilityaud this is effected as follows:The water colored by the aforesaid color reaction is allowed to run fromthe glass2 through the cock 4 into the glass 3 and by opening the cock11 a little of another test solution is added drop by drop to thercddencd water as it is present in the glass 2 from the vessel 10. Ifnow the discharge of the reddish color takes place after the addition ofa certain number of drops from the vessel 10, then the color reaction inthe glass 2 is proved to be correct. By the necessity of adding to thewater in the glass 3 more or less drops from the vessel 10, the exactinformation is given whether the reaction in the glass 2 was correct. Inthe glass 3 is therefore by means of a color removing reaction in theopposite direction than the test in the glass 2, a proof whether any ora sufficiency or too much soda or the like is in the boiler and thercfdie the reaction in the glass 2 is specially verified. Consequently onlyin the combination of the color test with the color removing test theabsolute certainty of the chemical control can be obtained.

The float 18 provided in this apparatus indicates by means of a seriesof marks placed upon it whether and how much soda and other matter hascollected in the boiler water, strongly concentrating the same. Theboiler water can easily be introduced through the cock 15 into the glasscylinder 17. If the selected mark of the float rises above the level (ifthe water in the show glass 17 it indicates that the water in the boilercontains too much soluble matter which is apt to cover the walls withincrustations and the boiler should be blown out.

The new device therefore controls the working (a) by means of a colortest; (b) by means of a color removing test; (0) by a float indicator ofthe amount of concentration. I

Consequently by nieansof the combination of the two control systemsindependent of one another and which nevertheless mutually complete oneanother,

Apparatus for testing boiler water while the bdiler is operatingcomprising two test glasses 2 and 3 one above the other and connected bya cock 4, the upper being provided with a connection to the boiler todraw water and with means to add.chemicals for color test, a glassvessel 10 for chemicals to remove the color in the lower test glass,being placed higher than test glass 3 and suitably connected therewithto admit said chemicals from vessel 10 drop by drop and a show, cylinderwith a float, suitably connected with the boiler to draw watertherefrom, substantially as described.

In testimony of all which I have hereunto subscribed my name.

AUG. SCHMITZ.

Witnesses:

v HENRY Quanrnme,

MATTHEW C. DILLINGHAM.

